Design And Practice On The Open Architecture Based Intelligent Traffic Signal Control System

Intelligent Traffic Signal Control System offers a potentially effective settlement for city traffic management. In the past decade, it has been a popular issue in Intelligent Traffic Signal Control System with increasing concern for its large-scale application and potential business benefits. Current there are a variety of commercial Intelligent Traffic Signal Control System,there is an urgent need to address the issues of standardization and intelligent in the development of ITC.In the thesis, we focus on two core issues of standardization and intelligent, research on some aspects of open architecture based ITC, our work contributes to the following aspects:1. Open Architecture based ITC research. In referring to some foreign open system standards about ITC, raise suited to China's national conditions open architecture based ITC standards. It supports the NTCIP standard. Multiple-phases mode is the control mode commonly used in China. Ring-Barrier mode is used in NTCIP. The difference and the conversion between Multiple-phases mode and Ring-Barrier Mode are discussed.2. Car flow detection algorithm. The updating condition of background is analyzed in details. Detection algorithm based on color differences is discussed. Car flow detection based on area threshold is presented. After the experiment, we find that it is fast, accurate and robust.3. Design an open architecture based ITC. The system is designed with the idea of Open Architecture, support the NTCIP standard, provide detection and control API of traffic signal light, system can be easily expanded and integrated. Car flow detectors are integrated with Intelligent Traffic Signal Controller to form a closed loop control system, running the self-adaptive control algorithm, increase intelligent to the system, achieve good control results.